For the last 25 years, the issue of health care privatization has frequently been a subject of public debate in Québec. Already during the 1980s, when the health sector was starting to be under pressure, the use of the private sector was presented as a possible alternative. More recently, with the adoption of bill 33 by the liberal government of Jean Charest, many groups in the civil society have denounced the privatization of health care. What is striking when we study health care privatization is that the concept is rarely clearly defined. Through a closer look at the Quebec case, this research first recalls how the idea of health care privatization has emerged and progressed. This idea appeared during the 1980s when health care public programs started to represent important pressures on the public finance of states that were also experiencing an economic crisis. At the same time, neoliberalism and its questioning of the welfare state was slowly eclipsing keynesianism. A new way of managing health care public programs seemed necessary. New public management and the techniques it proposes, privatization being one of them, appeared to be the solution to consider. Then, through a literature review, this research analyzes the concept of privatization, in the realm of social protection in general but also more specifically in health care. Through this process, the research clarifies the concept of privatization and defines it systematically. Thus, privatization in the health care sector transfers responsibility from the public to the private in different areas. These areas are: 1) management and administration, 2) financing, 3) provision, 4) ownership. Adding to this definition, privatization is a process of change and can be initiated actively or passively. The last part looks more particularly at the Québec case and shows how privatization has evolved in the Québec health care sector. It also highlights how some aspects of the Canadian institutional context have influenced health care privatization in the province. Québec has not been impervious to privatization. After the cuts in health care funding by the federal government that began in the 1980s, the Québec’s government reacted by actively privatizing some complementary health services through de-insurance. It has also put in place the ambulatory shift policy, which has lead to a passive privatization of health care. The ambulatory shift represented a new trend in health care provision that consists in sending patients home more quickly after their hospitalization. The Canadian Health Act, considered as an obstacle to privatization, does not limit this kind of privatization. Finally, with the passing of bill 33, after the Chaoulli case, the Québec’s government has actively opened the door to the private sector in three health care activities: administration and management, provision, and financing.